Workholding device



g- 1931- M. LONGN'ECKER ET AL 1,320,812

WORKHOLDING DEVICE Filed Dec. 15, 1930 4 Sheets-Sheet 2 INVENTORS WJW mway.

Aug. 25, 1931. LONGNECKER ET AL ,8

' WORKHOLDING DEVICE I INVENTORS flaw/v lawn/5mm, .5 By MLL/AMM. EL /N5,

A TTORNEY.

Aug.'Z5, 1931. I M. LONGNECKER ET AL 1,820,812

WORKHOLDING DEVICE iled De c. 151930 -4 Sheets-Sheet 4 INVENTORS M0270 LONGNECKER Val/AM M. ELK/N5,

A TTORNEY.

mounted within an opening 28,

0 ing member15, and arranged within a recess or the'like, the heads of which are counter? sunk Within recesses formed in the tracks.

It is, thus, seen that'the recesses 16, recesses and tracks 21, effect a sliding connection between the attaching disc 12 and the sup portingmember15, so that the supporting member may" be moved radially with respect to the attaching disc. Theinner longitudinal edges 23 of the recess '17 are inclined, for slidwear compensating able engagement with the'inclined faces of faces 25, which are parallel with the tracks 1 21, andthese faces 25 are parallel with each other. 7 These tapered wear compensating guides are held in the seated position by bolts 26,- or the like. It is obvious that'the guides 24 may be longitudinally adjusted to compensate for wear, and to effect a proper sliding engagement between the body portion 18, of the radially adjustable supporting-memlber 15, and the attaching disc 12.

' is rotatablewithinthe lug 29,

Means are-provided tomovethe supporting .member 15 radially with relation tothe disc.

'15, including a radially disposed adjusting screw 27, having its outer end 'rotatably formed in a This screw I but cannot move longitudinally. with relation thereto. The screw-threaded portion of theoperating screw engages within: a screw-threaded openlug 29, integral with thedisc 12.

ing formed in a lug 30, integral with the sup- '5 porting member 15. The screw 27 is provided at itsouter end with an extension 31, which 3 is polygonal in cross-section, to be engaged by a'tool' for turning the same; A disc 32 is carried. by the extension 31, to rotate. there with, and this disc is provided with a graduated scale,

, for co-action with a stationary pointer33, indicating the eXtentof movement of the screw.

' g Meansare provided toliniitl the, radial The numeral 34-designates movement 'ofthesupporting member 15, from 'f the. lug 29, so that the operating screw '27 cannotdisengage the lug 30. This step means embodiesa block 33,'rigidly attached to the disc v 12, by a bolt 34', orthe like. 1 The block is disposed in the element 35", attached to the rotary support- 36. 1 H a rotary supporting-member, which is, preferably, cylin- "drical, and has its face or side 'slidably en- 'g agingtheface or side of able supporting member 15. The rotary supprovided centrally thereoi'iwith a, preferably,tubular cylindrical pivot-35, operating within a bearing 36,

. arranged within a central opening 37, formed in the member 15. The

members 15. and34' are provided, at their peripheries, with an nular'recesses 38, receiving the flanges39 of a coupling ring 40, preferably formed in; two partsiand bolted together, as shown at '41.

guides 24, having inner path of travel'of a'stop' the radially adjust- It ispreferred that the coupling ring4O be held against rotary movement, and to accomplishthis, we provide a stop pin 42, which is rigidly attached tothe radially adjustable supporting men1berf15, and arranged to engage faces43 of the lringparts, as shown. The coupling ring serves to connec tithe'members 15 and 34, at their peripheries,'permittingof the member 34 to be turned with respect to the member 15, but holding the mem ber 34 against longitudinal movement'from the member 15. a Means are provided to lock the rotary supportingmember 34 in the adjusted rotary position, comprising a reciprocatory bolt 44, slidable within an opening 45, formed in the radially' adjustable supporting member 15. This-bolt projected by meansof acompre'ss iblecoil spring 46. The bolt 44 has its forward end adaptedtoenter a bushing 47, ar-

ranged within an opening 48, formed in the rotary supporting member 34. The rotary supporting member 34 may have any suitable number of recesses .48, formed therein, spaced apart for any selected number of degrees,

such as 180", or thelike. It is, thus,;s een that when the rotarysupporting member 34is turned, with respect to the member 15, to the selected position, it is automatically locked in such adjustable positionby thebolt 44.

Means are provided to'retract the bolt 44, comprising a rotary cylinder 49,,ope'rating withina cylindrical recess: 50,. and held against longitudinal movement byapin 51, operating within an annular groove 52. Thu;

cylindercarries an eccentric pin 53, operating within a transverse'slot'54, formed in they bolt. I The cylinder 49 has a recess 55, formed 1 at its outer end, which recess is, polygonal for turning the same. p

Formed integral with the rotary supporting member 34, and from the same at its in cross-section for receiving a suitable tool, 1

57 formed therein, receiving bearings-orbushings 58. Thesebushings reoeivethe rotary stub-shafts 59, screw-threaded at their outer ends for receiving n'uts61. The stub-shafts 59 are provided at their inner ends with heads 62, and extend through openings63,formed in discs 64 and 65. The discs 64 and'65 are locked to the stub-shafts 5.9,by keys 66. VVe preferably, arrange wearf plates 67 and'68 Formed integral with'thedis'cs 64 an'd is a relatively stationary aw 169, "or. a work hold-' ing element, disposedoppositeito a co acting adjustable jaw 70. The jaw 70 is connected to the jaw 69, by rods 71,havingscrew-thread 'ed inner ends 72, engaging within screwthreaded openings .73. The rods 71" have heads 74 rigidly secured thereto, by means of, which the rods maybe turned. The aws projecting forwardly periphery, are spaced parallel arms'56,.havingcylindrical openings :1

between the arms 56'and the discs 64""and 65.

member and provided in its periphery with anannular recess, a two-part coupling ring having 'fianges .to enter the recesses at the peripheries of said members, means to lock the rotarysupporting member tothe radially adjustable supporting member at a selected adjustedrotary position, and work holding means carried by the rotary supporting member.

4. A-wo-rkholdingdevice, comprising an attachingpl'ate, an annular supporting memher having a central opening and having an annular recessin its periphery and arranged upon one side of the attaching plate, said annular supporting" member being provided with a lug having a screw-threaded opening and being provided substantially diametrically'opposite thelug and adjacent to its element secured to the attaching periphery with a recess, a radially adjusting screw carriedby the attaching plate and engaging within the screw-threaded opening of the lug to adjust the annular supporting member radially of the attaching plate, a stop plate and arranged to enter 'thelast-named recess formed in the annular supporting member to the relatively ress e 7 "turn at substantially a right angle to. the

rection of adjusted turning movement of the rotary supporting member, spring-pressed I bolts to lock the inner discs tothe outer discs at selected adjusted positions, 'a relatively stationary j awrigidly connecting thojinner discs, anopposedmovable ]3.W,- and adjustable means connecting the movable'jaw with V stationary jaw near the'ends of-said jawsr: i

I11 testimony whereof weaffix our signae tures; V 1 r f j I MORTON LONGNECKER.

WILLIAM ELIUNS.

engage therewith and'limit its radial movement in one direction, a rotary supporting member having a central pivot to enter the central opening of the annular supporting member and'provided in its periphery with P an annularrecess, a coupling ring having flanges to enter the recesses at the peripheries of saidmembers, means to lockthe rotary supporting-member to the radially adjust-- able su'porting member-at selected rotary "POSItlOIIS, and workfholding-means carried by therotary supporting member.

' 5'. A work holding device, comprising an attaching plate, a supportingmemberhavlng'an-annula-r recess in ts periphery and arranged upon one side o-fthe attaching .plate,slidin'g connecting means between the attaching plate and supportin gme'mberso that the supporting member may be} adjusted radially with relation to the attaching plate.

' means to effect the radial adjustment of the supportingmember, a rotary supporting member disposed-upon one side of-the radially adjustable supportlng member and providedin ts'periphery with an annular recess,

ing membergfto the radially adjustable supporting member at a selected adjusted rotaryposition', a pair: of spaced arms rigidly secured to the rotary supporting member and projectingbeyond one side ofthe'same,'said arms-being provided at their free ends with discshaving' flatfaces, a pair of discs arranged inwardly of and adjacent to the firstnamed disc and having co-acting fiat faces,

means to pivotally connect the innerdiscs 1 with the outer discs so that 'they-are free tov a coupling ring having flanges to enter-the I annular recesses at thejperipheries of said members, means to lock the rotary support- 

